Lock



. LEDlN Apg. 31, 1937.

Filed Marc'h s1, v195e 2 sheets-sheet 1 Augl 31, 1937.

C. LEDIN LOCK vFiled March 31, 1936 2 sheds-sheet 2 mi ri INVENTORTTORNEY Patented Aug. `31, 1937 UNITED STATES LOCK* Charles Ledin,Stamford, Conn., assignor to The Yale & Towne Manufacturing Company,Stamford, Conn., a corporation of Connecticut Application March 31,1936, Serial No. 71,856

. 12 Claims.

This invention relates to a lock of the rim type in which a considerableportion oi the lock is adapted to be housed in an open mortised portionof the door.

Those skilled in the art will readily appreciate that rim locks areusually housed in a casing maintained entirely on the outside face ofone side of a door and operable either by a knob extending from thecasing, or by a cylinder located on the other side of the door andhaving a tongue or connecting bar extending into the lock casing.

Such rim locks are usually quite unsightly but have an advantage in thatthey are relatively simple to install. My invention relates to a locksimilar to the type just described, but in which about half the casingis adapted to be maintained within an open mortised portion or recess inthe door, so that only a small part of the casing projects beyond theface of the door. This gives a very pleasing effect, and because of myparticular construction, which will be described later on, I am able toobtain this effect without complicating the method of applying the lockto a door.

Before describing in detail the features of my invention, it may be4well to indicate generally its construction and method of operation.The lock comprises a base plate which is in effect a lock casing adaptedto occupy a recess or open mortised portion of the door. This baseplate, or lower .casing as it may also be termed, has a series of lugswhich rest on the surface of the door surrounding the recess, and whichlimit the insertion of the base plate into the recess or open mortisedportion. Preferably, screws are adapted to enter the bottom surface ofthe base plate to secure the same to the bottom surface of the openmortised portion, and the degree of movement of the base plate into theopen mortised portion under the influence of these screws is, of course,determined by the lugs resting against the face of the door.

The outer casing portion of my lock is formed decoratively, and it holdsin position the bolt and a cam for retracting the bolt. The bolt and camare mounted on this casing portion, but eX- tend beyond it so as to liepartially, at least, in the open mortised portion of the door. Thisouter casing has a peripheral edge portion adapted to lie just outsidethe open mortised portion of the door or recess,` so as to entirely hidethat recess and to give a very pleasing effect. The outer casing ispreferably equipped at its rear end with a lug adapted to interlock with(Cl. Y0-151) an upstanding ear on the base plate at the rear of the baseplate. At its front end, the casing has an end surface adapted to lie inthe plane of the end face of the door and arranged to be secured byscrews, preferably, to upstanding ears at the front end of the baseplate.

The construction of the lug at the rear ofthe outer casing, and theperforated ear on the base plate, is such that when the screws at thefront end are tightened, cooperating cam surfaces on the lugs and theperforated ear of the base plate will cause the casing and base platetodraw together laterally as well as endwise, to move the casing tightlyagainst the surface of the door, and thus give a very pleasingappearance to the lock.

yMy invention comprises further details which are of course important,but which will be described in detail hereinafter in connection with thedrawings, wherein a preferred embodiment of my invention is shown.

In the drawings, Fig". 1 is a View of the outer casing of. my lock andthe strike cooperable therewith. Fig. 2 is a section through the lockand strike, showing the construction of the parts. Fig. 3 is a Viewsubstantially along section lines 3,- -3 of Figf2. Fig. 4 is an end viewof Fig. 3, looking at it from the left. Figs. 5, 6 and 7 are differentviews of the construction of the bolt and the bolt retracting means, andthe outer casing portion.

Referring now more particularly to the drawings, it will be noted thatthere is a door I0 having an open mortised portion, or recess Il, inwhich is adapted `to lie the base plate or lower casingpo-rtion I2. Thisbase plate I2 has an upstanding ear I3, which is perforated at I4 for apurpose which will be explained presently. The base plate has also aseries of upstanding lugs I5 bent over at I6 and cooperable with, theedge of the door l0 surrounding the recess or open mortised portion II..A pair of screws I'I traverse perforated portions of the lbase plate,as is best seen in Figs. 2 and 3, and thus secure the base plate in therecess at a depth determined by the portions I6. The base plate I2 isfurther secured relatively to the recess Il by screws I8 lying betweenthe base plate and lugs I9 formed on a cylinder lock 20, which cylinderlock is adapted to operate the lockingv mechanism through af connectingbar 2| in a manner well understood in the art. The method of securingthe base plate in the recess may be modified readily, the main featureof the construction lli being the means determining the position of thebase plate relatively to the face of the door.

The outer casing is designated by reference numeral 22 and has mountedthereon a bolt retracting knob 23 having xed thereto a cam 24 bearingpin 25 which acts to retract the bolt, as will be explained later, whenthe knob 23 is rotated.

The outer casing has a peripheral edge portion 26 adapted to lie justoutside the recess II and to lit againstthe face of the door surroundingthe recess, 'as is best seen from Figs. 2 and 3. A lug 21 extends fromthe casing at its inner end and is adapted to rest within theperforation I4 of the upstanding ear I3 of the base plate forinterlocking with the base plate, as will be readily understood.

At the front end of the outer casing, there is formed an end surface 28perforated at 29 for a pair of screws 30 which are adapted to enterthreaded upstanding ears 3| in the basel plate I2. It will be readilyappreciated that when the screws 311 are rotated to their extremeposition, they act to` draw the base plate and casing together endwise.Because the lug 21. has a cam surface 21a. cooperable with theperforation I4 of ear I3, the relative endwise movement of the casingand plate caused by the turning of the screws 36 acts to cam the outercasing and base plate together, and to force the peripheral edge 26. ofthe outer casing rmly against the face of the door or to. any slightpreferred spacing away from the door. All this adjustment and securingof the outer casing is, of course, controlled by the securing screws forthe base plate, and the locating lugs I6 of the said base plate.

The outer casing 22 carries the bolt of my lock, designated by referencenumeral. 35. The bolt has anintegral tail portion 36 and a central.spring supporting rod-.like portion 31., on which is mounted a spring 38maintained between the rear surface 39: of the bolt and a washer 40backed up by a perforated upstanding lug 4I through which the. portion31v traverses when the bolt is retracted, while the spring is compressedagainst tl'lewasher 40. The cam- 24- of knob 23, through the pin 25previously described, is adapted to retract the. bolt by cooperationwith surfaces 42 and 43 of the tail portion 36of the bolt. The bolt isreversible for right and left hand doors, and, therefore, ismadevsymmetri cali with one of the surfaces 42, 43 available to the pin.25 regardless of the particular hand of thelock assembly.

Whilenormally the pin 25 is adapted to rest against the portion 42l ofthe tail of the bolt in the assembly illustrated, it is possible torotate the cam from the position of Fig. to the position-,of Fig. 6 soas to .permit the bolt to be thrown an extra amount by the spring, asiseasily seen by referenceto Figs. 5 and 6. In theposition of Fig. 6also, the bolt 35 is deadlocked because of the position-of thevpin 25opposite the surface 44 of the latch bolt tail, the pin 25being in adead center position so as to obstruct rearward movement of the bolt 35.

For maintaining the bolt 35-in a retracted position, best illustrated inFig. 7, Iuse a thumb p iece 45, shown in Figs. 1 and 2, maintained forsliding movement relatively to a slot 46. of the casing22, Secured tothe member 45 is a slide piece 41 having a spring portion 48 cooperablewith a lip 49 on the casing to maintain the slide piece 4-1 in itsposition of Fig. 6, or in its position ofl Fig. 7.

In its position of Fig. '7, the slide piece 4l is so located that theright hand end of an angular lug 50 thereon cooperates with a lug 5I onthe upper side of the bolt for maintaining the bolt against outwardmovement so that the bolt is retained in its position of Fig. 7. Theangular position of the lug 50 is adapted to prevent the lug and themember 4l from obstructing the rearward movement of the bolt from theposition of Fig. 6 to the position of Fig. 7, since the angular surfacewill permit the member 4l to be cammed upwardly by the rear of the lug5I. As was already indicated, the bolt 35 is made symmetrical so that itis reversible and thus has two lugs 5I in addition to the two portions42 and 43 on the bolt tail already described.

I provide stop lugs 35a, on the outer casing portion 22 which limit theretractive movement of the bolt 35. I also provide a struck-up lug 24ayon the cam 24 cooperable with a lug 22a for limiting the rotation of thecam 22. For cooperation with the bolt 35, I utilize a strike 52 shownonly in Fig, 2, this strike being of the usual form well known in theart, except that it is designed for particular cooperation with thelocking mecha- Ilism of the main portion of my lock.

For operating the cam pin 25 from the outside of the door, as I havealready indicated, I provide a cylinder lock 20 equipped with aconnecting bar 2I which may be rotated in a manner well understood inthe art. A cam 53 is mounted for rotation on the plate I2 and isperforated at 54r for the entry of the connecting bar 2|. 'I'he cam 53also carries a pair of arms 55 which cooperate with the pin 25, as bestillustrated inV Fig. 2. It is easily seen that rotation of theconnecting bar 2I by the cylinder lock 20 will retract the bolt throughcoaction of one of the arms 55 with the pin 25. I believev that theoperation of my invention will now be quite clear to those skilled intheart.

I` now claim:

1. In a lock of the class described. a base plate having a depressedportion adapted toI occupy an open mortised portion in a door and havingalso offset portions adapted to overlie the surfacefof the door aboutsaid open mortised portion, fastening screws securing said baseplate tosaid door, a casing havinga peripheral outlining portion adapted to liewith its edge-juxtaposed relatively tothe surface of the door about theedge of said open mortised portion while covering said portion, lockmechanism carried by said casing and fitting into the depressed portionof said base plate lying in the open mortised: portion ofthe door, andscrews for joining said casing to the said base plateand therebyassembling the lock on said door.

2. In a lock of the class described, a base plate having a depressedportion adapted tooccupy an open mortised portion in a door and havingalso onset-portions adapted to-overlie the surface of the door aboutsaidopen mortised portion, fastening screws securing said plate tothedoor, screw threaded lugs at one end ofV said base plate and upstandingtherefrom, a perforated ear at the other end of said base plate andupstanding therefrom, a casing having a peripheralI outlining portionadapted to lie with its edge against the surface of the door about theedge of said open mortised portion while covering said portion, lockmechanism carried by said casing and fitting into the depressed portionof said base plate lying inthe open Amortised'portion of the door, anouter end surface of said casing adapted to be aligned with the edge ofthe door, a hook formed near the inner end of said casing and on theinside surface thereof and extending beyond the peripheral outliningportion thereof, said hook being adapted for engagement with theperforated lug of said base plate, and screws for joining the outer endsurface of said casing with the screw threaded lugs on said bas'e plate.

3. In a lock of the class described, a base plate adapted to occupy anopen mortised portion in a door, offset portions on said base plateoverlying the surface of the door about the edge of said open mortisedportion and determining the depth of insertion of the base plate intosaid open mortised portion, fastening screws securing said base plate tothe bottom surface of said open mortised portion, screw threaded lugs atone end of said base plate and upstanding therefrom, a casing having aperipheral outlining portion adapted to lie with its edge against thesurface of the door about the edge of said open mortised portion Whilecovering said portion, an outer end surface of said casing adapted to bealigned with the edge of the door, and screws for joining the outer endsurface of said casing with the screw threaded lugs on said base plate.

4. In a lock of the class described, a base plate adapted to occupy anopen mortised portion in a door, offset portions on said base plateoverlying the surface of the door about the edge of said open mortisedportion and limiting the depth of insertion of the base plate into saidopen mortised portion, fastening screws securing said baseplaterelatively to the bottom surface of said open mortised portion,screw threaded lugs at one end of said base plate and upstandingtherefrom, a perforated ear at the other end of said base plate andupstanding therefrom, a casing having a peripheral outlining portionadapted to lie with its edge against the surface of the door about theedge of lsaid open mortised portion while covering said portion, anouter end surface of said casing adapted to be aligned with the edge ofthe door, a hook formed near the inner end of said casing and on theinside surface thereof and extending beyond the peripheral outliningportion thereof, said hook being adapted for engagement with theperforated lug of said base plate, and screws for joining the outer endsurface of said casing with the screw threaded lugs on said base plate.

5. In a lock of the class described, a base plate adapted to occupy anopen mortised portion in a door, offset shoulders on said base plateoverlying the surface of the door about the edge of said open mortisedportion and limiting the depth of insertion of the base plate into saidopen mortised portion, fastening screws securing said base platerelatively to the bottom surface of said open mortised portion, screwthreaded lugs at one end of said base plate and upstanding therefrom, aperforated ear at the other end of said base plate and upstandingtherefrom, a casing having a peripheral outlining portion adapted to liewith its edge against the surface of the door about the edge of saidopen mortised portion while covering said portion, an outer end surfaceof said casing adapted to be aligned with the edge of the door, a hookformed near the inner end of said vcasing and on the inside surfacethereof and extending beyond the peripheral outlining portion thereof,said hook having a cam surface for engagement with the perforated lug ofsaid base plate, and screws for joining the outer end surface of saidcasing with the lugs on said base plate for drawing said casing endwiserelatively to said plate whereby through the cam surface on the hook todraw said plate and casing together laterally as well as endwise.

6. In a lock of the class described, a base plate adapted to occupy anopen mortised portion in ,a door, offset shoulders on said base plateoverlying the surface of the door about thel edge of said open mortisedportion and limiting the depth of insertion of the base plate into saidopen mortised portion, fastening screws securing said base platerelatively to the bottom surface of said open mortised portion, an opencasing having a peripheral outlining portion adapted to lie with itsedge against the surface of the door about the edge of said openmortised portion while covering said portion, an outer end surface ofsaid casing adapted to be aligned with the edge of the door, screws forjoining the outer kend surface of said casing with said base plate, abolt retracting cam on said base plate, a cylinder lock secured to saidbase plate, and a tongue on said cylinder lock engaging said cam.

7. In a lock of the class described, a base plate adapted to occupy anopen mortised portion in a door, offset shoulders on said base plateoverlying the surface of the door about the edge of said open mortisedportion and limiting the depth of insertion of the base plate into saidopen mortised portion, fastening screws securing said base platerelatively to said open mortised portion, a casing having a peripheraloutlining portion adapted to lie with its edge against the sur-- face ofthe door about the edge of said open mortised portion while coveringsaid portion, an outer end surface of said casing adapted to be alignedwith the edge of the door, screws for joining the outer end surface ofsaid casing with the said base plate, a bolt retracting cam on said baseplate, a bolt and bolt retracting mechanism carried by said casing, saidbolt retracting mechanism being operable by said base plate cam whensaid casing is joined to said base plate.

8. In a lock of the class described, a base plate adapted to occupy anopen mortised portion in a door, offset shoulders on said base plateoverlying the surface of the door about the edge of said open mortisedportion and limiting the depth of insertion of said base plate into saidopen mortised portion, fastening screws securing said base platerelatively to said open mortised portion, screw threaded lugs at one endof said base plate, a casing having a peripheral outlining portionadapted to lie with its edge gainst the surface of the door about theedge of said open mortised portion While covering said portion, an outerend surface of said casing adapted to be aligned with the edge of thedoor, screws for joining the outer end surface of said casing to thelugs on said base plate, a bolt retracting cam on said base plate, abolt and bolt retracting mechanism carried by said casing and extendingtherefrom beyond the plane of the edge of its peripheral outliningportion and therefore into said open mortised portion of the door, saidbolt retracting mechanism being operable by said base plate cam whensaid casing is joined to said base plate.

9; In a lock of the class described, a base plate adapted to occupy anopen mortised portion in a door, offset shoulders on said base plateoverlying the surface of the door about the edge of said open mortisedportion and limiting the depth of insertion of the base plate into saidopen mortised portion, fastening screws securing said base plate to saidopen mortised portion, screw threaded lugs at one end of said baseplate, a perforated ear at the other end of said base plate andupstanding therefrom, a casing having a peripheral outlining portionadapted to lie with its edge against the surface of the door about theedge of said open mortised portion while covering said portion, an outerend surface of said casing adapted to be aligned with the edge of thedoor, a hook formed near the inner end of said casing and on. the insidesurface thereof and extending beyond the peripheral outlining portionthereof, said hook having a cam surface for engagement with theperforated lug of said base plate, and screws for joining the outer endsurface of said casing with the lugs on said base plate for drawing saidcasing endwise relatively to said plate whereby through the cam surfaceon, the hook to draw said plate and casing together laterally as well asendwise.

10. In a lock of the class described, a base plate adapted to occupy anopen mortised portion in a door, offset shoulders on said base plateoverlying the surface of the door about the edge of said open mortisedportion and limiting the depth of insertion of the base plate into saidopen mortised portion, fastening screws securing one end of said baseplate relatively to said open mortised portion, a lock cylinder againstthe surface of the door opposite said base plate, screws between saidcylinder and base plate for securing the other end of said base platerelatively to said cylinder and therefore to said open mortised portion,screw threaded lugs at one end of said base plate and upstandingtherefrom, a casing having a peripheral outlining portion adapted to liewith its edge against the surface of the door about the edge of saidopen mortised portion while covering said portion, an outer end surfaceof said casing adapted to be aligned with the edge of the door, andscrews for joining the outer end surface of said casing with the lugs onsaid base plate.

11. In a lock of the class described, a base plate having a depressedportion adapted to occupy an open mortised portion in a door, and havingalso offset portions adapted to overlie the surface of the door aboutsaid open mortised portion, fastening screws securing said base plate tosaid door, a casing having a peripheral outlining portion adapted to liewith its edge juxtaposed relatively to the surface of the door about theedge of said open mortised portion while covering said portion, lockmechanism carried by said casing and fitting into the depressed portionof said base plate lying in the open mortised portion of the door, andscrews for joining said casing to the said base plate.

12. In a lock of the class described, a base plate having a depressedportion adapted to occupy an open mortised portion in a door, and havingalso offset portions adapted to overlie the surface of the door aboutsaid open mortised portion, fastening screws securing said base plate tosaid door, a casing having a peripheral outlining portion adapted to liewith its edge juxtaposed relatively to the surface of the door about theedge of said open mortised portion while covering said portion, andscrews for joining said casing to the said base plate.

CHARLES LEDIN.

